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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 592 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.5/8 − 1/2 =
  2. 2.2/5 − 1/3 =
  3. 3.A bottle has 3/4 litre of juice. Diya drinks 3/7 litre. How much juice is left (in litres)? =
  4. 4.A bottle has 1/6 litre of juice. Vihaan drinks 1/8 litre. How much juice is left (in litres)? =
  5. 5.2/3 − 4/7 =
  6. 6.Aarav has a ribbon 9/10 m long and cuts off 5/6 m. How long is the ribbon now (in m)? =
  7. 7.A tank is 7/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  8. 8.Arjun has a ribbon 1/3 m long and cuts off 1/5 m. How long is the ribbon now (in m)? =
  9. 9.Vihaan has a ribbon 1/2 m long and cuts off 2/5 m. How long is the ribbon now (in m)? =
  10. 10.A tank is 8/9 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  11. 11.Anaya has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  12. 12.5/6 − 3/10 =
  13. 13.7/10 − 1/3 =
  14. 14.1/2 − 2/7 =
  15. 15.Meera has a ribbon 2/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  16. 16.7/9 − 1/2 =
  17. 17.7/8 − 1/4 =
  18. 18.1/2 − 4/9 =
  19. 19.3/4 − 3/7 =
  20. 20.3/4 − 1/5 =
  21. 21.A bottle has 9/10 litre of juice. Kabir drinks 4/5 litre. How much juice is left (in litres)? =
  22. 22.A bottle has 6/7 litre of juice. Riya drinks 1/3 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 2/3 litre of juice. Kabir drinks 2/9 litre. How much juice is left (in litres)? =
  24. 24.1/3 − 1/8 =
  25. 25.5/6 − 7/9 =
  26. 26.A bottle has 3/5 litre of juice. Anaya drinks 1/6 litre. How much juice is left (in litres)? =
  27. 27.1/4 − 1/8 =
  28. 28.Sara has a ribbon 5/7 m long and cuts off 1/4 m. How long is the ribbon now (in m)? =
  29. 29.3/5 − 3/10 =
  30. 30.5/8 − 1/6 =
  31. 31.A tank is 3/4 full of water. Then water filling 5/7 of the tank is used. What fraction of the tank is full now? =
  32. 32.Vihaan has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  33. 33.7/10 − 2/5 =
  34. 34.1/2 − 1/10 =
  35. 35.3/10 − 1/6 =
  36. 36.A tank is 1/4 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  37. 37.5/6 − 1/5 =
  38. 38.2/3 − 1/9 =
  39. 39.2/3 − 3/10 =
  40. 40.5/6 − 5/9 =

Answer key

  1. 1/8
  2. 1/15
  3. 9/28
  4. 1/24
  5. 2/21
  6. 1/15
  7. 11/18
  8. 2/15
  9. 1/10
  10. 7/18
  11. 1/14
  12. 8/15
  13. 11/30
  14. 3/14
  15. 1/28
  16. 5/18
  17. 5/8
  18. 1/18
  19. 9/28
  20. 11/20
  21. 1/10
  22. 11/21
  23. 4/9
  24. 5/24
  25. 1/18
  26. 13/30
  27. 1/8
  28. 13/28
  29. 3/10
  30. 11/24
  31. 1/28
  32. 1/30
  33. 3/10
  34. 2/5
  35. 2/15
  36. 1/12
  37. 19/30
  38. 5/9
  39. 11/30
  40. 5/18

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